Datasheet Linear Technology LT3845A

Manufacturer	Linear Technology
Series	LT3845A

High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequency

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PDF, 295 Kb, Language: en, File uploaded: Sep 19, 2017, Pages: 26
High Voltage Synchronous Current Mode Step-Down Controller with Adjustable Operating Frequency

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Prices

Packaging

	LT3845AEFE#PBF	LT3845AEFE#TRPBF	LT3845AIFE#PBF	LT3845AIFE#TRPBF	LT3845AMPFE#PBF	LT3845AMPFE#TRPBF
N	1	2	3	4	5	6
Package	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing
Package Code	FE	FE	FE	FE	FE	FE
Package Index	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)
Pin Count	16	16	16	16	16	16

Parametrics

Parameters / Models	LT3845AEFE#PBF	LT3845AEFE#TRPBF	LT3845AIFE#PBF	LT3845AIFE#TRPBF	LT3845AMPFE#PBF	LT3845AMPFE#TRPBF
Architecture	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode	Constant Frequency Current Mode
Demo Boards	DC1619A	DC1619A	DC1619A	DC1619A	DC1619A	DC1619A
Design Tools	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model	LTspice File,LTpowerCAD Model
Export Control	no	no	no	no	no	no
Features	Resistor Set Frequency, External Synchronization, Burst Mode	Resistor Set Frequency, External Synchronization, Burst Mode	Resistor Set Frequency, External Synchronization, Burst Mode	Resistor Set Frequency, External Synchronization, Burst Mode	Resistor Set Frequency, External Synchronization, Burst Mode	Resistor Set Frequency, External Synchronization, Burst Mode
Frequency, kHz	500	500	500	500	500	500
Frequency Adjust Range	100kHz - 500kHz	100kHz - 500kHz	100kHz - 500kHz	100kHz - 500kHz	100kHz - 500kHz	100kHz - 500kHz
Frequency Sync Range	100kHz - 500kHz	100kHz - 500kHz	100kHz - 500kHz	100kHz - 500kHz	100kHz - 500kHz	100kHz - 500kHz
Integrated Inductor	no	no	no	no	no	no
Ishutdown, µA	20	20	20	20	20	20
Isupply, mA	0.12	0.12	0.12	0.12	0.12	0.12
Max Phases	2	2	2	2	2	2
Monolithic	no	no	no	no	no	no
Number of Outputs	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85	-55 to 125	-55 to 125
Output Current, A	15	15	15	15	15	15
Polyphase	yes	yes	yes	yes	yes	yes
Sense Resistor	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense
Switch Current, A	15	15	15	15	15	15
Synchronous	yes	yes	yes	yes	yes	yes
Topology	Buck	Buck	Buck	Buck	Buck	Buck
Vin Max, V	60	60	60	60	60	60
Vin Min, V	4	4	4	4	4	4
Vout Max, V	36	36	36	36	36	36
Vout Maximum	36V	36V	36V	36V	36V	36V
Vout Min, V	1.231	1.231	1.231	1.231	1.231	1.231
Vref Accuracy Over Temp, %	1.2	1.2	1.2	1.2	1.2	1.2

Eco Plan

	LT3845AEFE#PBF	LT3845AEFE#TRPBF	LT3845AIFE#PBF	LT3845AIFE#TRPBF	LT3845AMPFE#PBF	LT3845AMPFE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Model Line

Series: LT3845A (6)

LT3845AEFE#PBF LT3845AEFE#TRPBF LT3845AIFE#PBF LT3845AIFE#TRPBF LT3845AMPFE#PBF LT3845AMPFE#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Down (Buck) Regulators > High Input Voltage Buck | External Power Switch Buck Controllers
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) Switching Regulators